Apr-22-2018, 05:57 AM
cypari gives some result:
>>> import cypari >>> cypari.pari('factor({})'.format(2**127-2)) [2, 1; 3, 3; 7, 2; 19, 1; 43, 1; 73, 1; 127, 1; 337, 1; 5419, 1; 92737, 1; 649657, 1; 77158673929, 1]