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cheap problem - easy if you know mersenne

Source: flanders '94

August 9, 2004
modular arithmeticnumber theory proposednumber theory

Problem Statement

Let a,b,m,na,b,m,n integers greater than 1. If anāˆ’1a^n-1 and bm+1b^m+1 are both primes, give as much info as possible on a,b,m,na,b,m,n.
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