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+ The prime p=197418203*2^25000-1 is a member of a set of three consecutive probable primes in arithmetic progression, since p-6090 is probably prime, all numbers between p-6090 and p are composite, all numbers between p and p+6090 are composite, and p+6090 is probably prime. As of January 2005, no larger set of three consecutive probable primes in arithmetic progression was known. A proof of the primality of p is given here. [Broadhurst]




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