Python Forum

Trawling the interwebs, I have stumbled across a 101 digit highly composite number. It's a beast to say to least

10334475851656087128243643125471284565310588797552748096314114788137761206785997576812685774304768000

Online websites only calculate up to 64 digits maximum

I am wanting it's factorization in order to work out it's number of divisors and to simply grasp the structure/patterns behind large highly composite numbers

After a little debugging, I managed to get this program working:-

# Python program to print prime factors 
  
import math  
# A function to print all prime factors of  
# a given number n 
def primeFactors(n): 
      
    # Print the number of two's that divide n 
    while n % 2 == 0: 
        print (2,end="") 
        n = n / 2
          
    # n must be odd at this point 
    # so a skip of 2 ( i = i + 2) can be used 
    for i in range(3,int(math.sqrt(n))+1,2): 
          
        # while i divides n , print i ad divide n 
        while n % i== 0: 
            print (i,end=""), 
            n = n / i 
              
    # Condition if n is a prime 
    # number greater than 2 
    if n > 2: 
        print (n) 
          
# Driver Program to test above function 
  
n = 10334475851656087128243643125471284565310588797552748096314114788137761206785997576812685774304768000

primeFactors(n) 
  
# This code is contributed by Harshit Agrawal

https://www.geeksforgeeks.org/print-all-prime-factors-of-a-given-number/

result was:-

2222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222222871414146316299.0

Which i worked out as: 2^283 and whatever 871414146316299.0 means

This does not seem correct. The biggest highly composite number calculable on number empire is
https://www.numberempire.com/963761198400

Which follows this factorization pattern

2 * 2 * 2 * 2 * 2 * 2 * 3 * 3 * 3 * 3 * 5 * 5
2^6 * 3^4 * 5^2
sextuplet, quartet, duo

Then simply "nails" the subsequent "lone prime" numbers in prime number sequence, doubling the divisor count of 105 from integer 129600 every new "lone prime"

Lone prime meaning to no power (no exponent) in the factorization

https://www.numberempire.com/129600

64 tetrahedron grid noticed which is pretty neat(2^6=64)

Thanks all,
Kev

Replace "/" with "//" (2 times)

#!/usr/bin/python3
import math

def primeFactors(n):
    # print the number of two's that divide n
    while n % 2 == 0:
        print(2, end=" ", flush=True)
        n = n // 2

    # n must be odd at this point.
    # so a skip of 2 (i = i + 2) can be used
    for i in range(3, int(math.sqrt(n))+1, 2):
        # while i divides n, print i ad divide n
        while n % i == 0:
            print(i, end=" ", flush=True)
            n = n // i

    # condition if n is a prime
    # number greater than 2
    if n > 2:
        print(n)

n = 10334475851656087128243643125471284565310588797552748096314114788137761206785997576812685774304768000
primeFactors(n)

(May-27-2019, 05:33 PM)heiner55 Wrote: [ -> ]Replace "/" with "//" (2 times)

#!/usr/bin/python3
import math..

def primeFactors(n):.
    # Print the number of two's that divide n
    while n % 2 == 0:
        print (2,end=" ")
        n = n // 2

    # n must be odd at this point.
    # so a skip of 2 ( i = i + 2) can be used.
    for i in range(3, int(math.sqrt(n))+1, 2):.
        # while i divides n , print i ad divide n.
        while n % i== 0:
            print (i,end=" ")
            n = n // i

    # Condition if n is a prime.
    # number greater than 2.
    if n > 2:.
        print (n)

n = 10334475851656087128243643125471284565310588797552748096314114788137761206785997576812685774304768000
n = 100
primeFactors(n)

you the man!

you are welcome

Although the result is looking much neater, still not quite understanding the results outputted

might just be me

Probably worth me getting back to the designer

My PC is still running the script.
I think it will never come to an end.
My PC is quite old

The script now outputs

22222222222233333355577711111313171719192329313741434753596167717379838997101103107109113127131137139149151157163167173179181191193197199211223

separated manually for quickness
2,2,2,2,2,2,2,2,2,2,2,2,3,3,3,3,3,3,5,5,5,7,7,7,11,11,13,13,17,17,19,19,23,29,31,37,41,43,47,53,59,61,67,71,73,79,83,89,97,101,103,107,109,113,127,131,137,139,149,151,157,163,167,173,179,181,191,193,197,199,211,223

So, if this is correct this isn't all that great of a highly composite number. Not superior highly composite. I didn't know what it was to be honest.

Do you Know of any code that can do the reverse? I tell it the factors it works out the number? I need a "Big" number crunching calculator, as in lots of digits, 300 plus.

I just figured out 129600 is 360*360

That got my sprunjer going

After 129600 your just chasing endless primes

Now with reverse:

#!/usr/bin/python3
import math


def primeFactors(n):
    list_factors = [ ]

    # print the number of two's that divide n
    while n % 2 == 0:
        print(2, end=",", flush=True)
        list_factors += [ 2 ]
        n = n // 2

    # n must be odd at this point.
    # so a skip of 2 (i = i + 2) can be used
    for i in range(3, int(math.sqrt(n))+1, 2):
        # while i divides n, print i ad divide n
        while n % i == 0:
            print(i, end=",", flush=True)
            list_factors += [ i ]
            n = n // i

    # condition if n is a prime
    # number greater than 2
    if n > 2:
        print(n, end=",", flush=True)
        list_factors += [ n ]

    print()
    return list_factors


def multiply(list_factors):
    res = 1
    for n in list_factors:
        res *= n
    return res


# main
n = 10334475851656087128243643125471284565310588797552748096314114788137761206785997576812685774304768000
print("number", n)

print("---")
list_factors = primeFactors(n)
print("---")

res = multiply(list_factors)
print("result", res)
print("---")

if n == res:
    print("OK")
else:
    print("ERROR")
#done

Nice code that mate. Much neater

I still could do with the reverse

I would use Sagemath / Derive / Matlab / Mathcad if I could

I am going to need to do it the hard way

---

I am giving Microsoft math a go. Its doing great!

gave me this little number, nice and quick too!

1367973534750057530142583514975050220736857267923292430366259205757805942886561493930444588192355642504774454222400

115 digits

Number of Factors

Three quintillion, seven hundred and eighty-three quadrillion, twenty-three trillion, six hundred and eighty-six billion, nine hundred and ninety-one million, two hundred and sixteen thousand, six hundred and forty

Highly composite number,

328 digits (maxed out Microsoft math)

3226064841928059523397979569946338218262205752503893243027824368891777440698556243004554463193287418911567727801430320528268997104967216533294045386641450118600488493439275991430590233442080228938358171935320314414150553379009317199377287861726656707087781474818468157561232944906242003584398983171485589345483705115268063332800