Mathematics, 12.02.2020 23:29, makylahoyle

1.28. Let {p1, p2,...,pr} be a set of prime numbers, and let N = p1p2 ··· pr + 1. Prove that N is divisible by some prime not in the original set. Hoffstein, Jeffrey. An Introduction to Mathematical Cryptography (Undergraduate Texts in Mathematics) (p. 54). Springer New York. Kindle Edition.

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1.28. Let {p1, p2,...,pr} be a set of prime numbers, and let N = p1p2 ··· pr + 1. Prove that N is di...