PrimOmatic: the prime numbers checker

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!

		Factors The next closest prime

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 prime number is 2^43,112,609-1.
Found on August 23rd, 2008.
(It contains 12,978,189 digits!)