ISL 2007 N7
For a prime and a positive integer , denote by the exponent of in the prime factorization of !. Given a positive integer and a finite set of primes. Show that there are infinitely many positive integers such that for all . (India)
Official text Transcription from NuminaMath olympiads, checked word for word against the official paper. Quoted with source.
Official text: IMO 2007 Shortlist booklet, page 64.
Solutions
Official solution Solution 1 by the IMO Problem Selection Committee
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