2641 is a number n such that n, n + 1, and n + 2 are products of two primes: n + 1 = 2642 = 2 x 1321 and n + 2 = 2643 = 3 x 881.
2641 is a pseudosquare modulo 11. It is the first pseudosquare that is not prime.
2641 is a centered pentagonal number.
A Room with a View by E.M Forester is Project Gutenberg's book 2641.
Source: Prime Curios!
2641 is a pseudosquare modulo 11. It is the first pseudosquare that is not prime.
2641 is a centered pentagonal number.
A Room with a View by E.M Forester is Project Gutenberg's book 2641.
Source: Prime Curios!
