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Largest known prime number. As of January 2017, the largest known prime number is 274,207,281 â 1, a number with 22,338,618 digits. It was found in 2016 by the Great Internet Mersenne Prime Search (GIMPS). Plot of the number of digits in largest known prime by year, since the electronic computer. Note that the vertical scale is logarithmic. The red line is the exponential curve of best fit: y = exp(0.187394 t - 360.527), where t is in years.
IsPrimeNumber is an easy to use and handy online prime number checker and calculator. We just launched the prime number checker page with the Constantine Adraktas Matrix Formulae. Share On Facebook Google+ Twitter. A prime number is a number that has no positive divisors other than 1 and itself. To check if a number is prime or not, simply type the number in box above and click calculate button. Prime number calculation page will displayed immediately after you submit your number. If the number is not a prime number, the divisors of number will be listed. I'd like to thank Constantine Adraktas for his support,