1758719

This number is a prime.

+ There are way too many formulae for π with arctan(1/m) terms, but π = 32*arctan(1/10) - 4*arctan( 1758719 / 147153121 ) with two primes 1758719 and 147153121 is a little different. (Submitted on 3/14) [Ellermann]

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