Prime
Number?
Prime
numbers are positive integers which have no divisors other
than 1 and themselves. Therefore, the first 10 prime numbers
are 2, 3, 5, 7, 11, 13, 17, 19, 23 and 29. Except for 2, all
primes are odd numbers. PrimOmatic calculator
will help you check if a number entered is prime, or eventually
find out the factors of that number along with its consecutive
closest prime!

Some
Peculiar Factorizations 
23,456,789
is prime!  G. Sarcone
888,888,888 = 98,765,432 x 9
111,111,111 =
12,345,679 x 9
12,345,678,987,654,321 = 12,345,679 x 12,345,679 x 81

The
largest known Prime Number 
On
January 7th, 2016, Dr. Curtis Cooper, a professor at the University
of Central Missouri, discovered the 49th known Mersenne prime, 2^{74,207,281}1,
a 22,338,618 digit number. This find shatters the previous
record prime number 2^{57,885,161}1 of
17,425,170 digits.
© G.
Sarcone, www.archimedeslab.org 
