261-1 is prime

English name European style with dashes

(chongo's home page) (return - more primes) (useful links below)

The decimal value of this prime was computed with calc and the English name was computed with number.



two tri-llion,
three hundred five bi-lliard,
eight hundred forty three bi-llion,
nine mi-lliard,
two hundred thirteen mi-llion,
six hundred ninety three thousand,
nine hundred fifty one



Some useful links

Large prime numbers

Definitions and theory

Searching for Mersenne primes

EFF Cooperative Computing Awards

Source code

Other prime links




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