分解 $2^{256}-1$
115792089237316195423570985008687907853269984665640564039457584007913129639936 == 2^256
factorise(115792089237316195423570985008687907853269984665640564039457584007913129639935)
3*5*17*257*641*65537*274177*6700417* ...
Answer