The book is now available! 671
(another Prime Pages' Curiosity)
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GIMPS has discovered a new largest known prime number: 282589933-1 (24,862,048 digits)

+ 671 is the 3-digit composite number (K) that yields the greatest percentage of primes from Leonhard Euler's formula: X^2 + X + K. 453 out of 1000 possible primes (45.3%). [Morse]

+ 671!/176! + 1 is prime. [Firoozbakht]




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