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Prime numbers, diophantine equations, diophantine approximations, analytic or algebraic number theory, arithmetic geometry, Galois theory, transcendental number theory, continued fractions

2 votes
1 answer
475 views

Small geometric progression modulo N

An problem related to integer factorization using the General Number Field Sieve is the following: Let $N$ be a composite. Must there exist a 5-term geometric progression $\lbrace a_0,a_1,a_2,a_ …
7 votes

Fastest way to factor integers < 2^60

Inria has published a paper factoring 50-200 bits integers. The four methods of choice are: SQUFOF, ECM, SIQS and CFRAC. Within the paper a short pseudocode is given for each method, so you may be …
Ng Yong Hao's user avatar
1 vote
Accepted

primes dividing binomial coefficients

Hi! I have a proposed answer for 2). You can construct an infinite series of counter examples. Erdos proved that there are primes between $n$ and $2n$. Now consider $2n=2^k$ for some $k>2$. We c …
Ng Yong Hao's user avatar