Question

is 2311 a prime or composite number?

Answers

Reiny
On my calculator I just tried for about 2 minutes to divide 2311 by primes < 49 (since 49^2 > 2311 , there is not need to go higher)

Actually the first few were pretty obvious, so I started with 7 , then
11,13,17,19,23,29,31,37,41,43,47

none divided exactly so, 2311 is prime

Related Questions