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PrimOmatic: the prime numbers checker

 
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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!

prime checker 1
prime checker 6
prime checker 7
prime checker 2
prime checker 3 Factors

The next closest prime
prime checker 4
prime checker 5
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 25th, 2013, Dr. Curtis Cooper, a professor at the University of Central Missouri, discovered the 48th known Mersenne prime, 257,885,161-1, a 17,425,170 digit number. This find shatters the previous record prime number 243,112,609-1 of 12,978,189 digits over 4 years ago (August 23rd, 2008).

© G. Sarcone, www.archimedes-lab.org


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