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Old 2005-02-06, 03:39   #38
geoff's Avatar
Mar 2003
New Zealand

48516 Posts

Congratulations rogue and michaf for the big primes.

If n=0 is allowed in the definition of base-5 Sierpinski number, then k=7528 has a prime 7528*5^0+1, but we will still need to eliminate k=5*7528=37640, so a prime 7528*5^n+1 for n >=1 must be found either way. This is the only exceptional case in Roberts list above, I have added an asterisk beside the other candidates in status.txt that don't need to be tested if n=0 is allowed.

My own results:
83032*5^39408+1 is prime.
33448*5^n+1 is not prime for n <= 100,000 and I am releasing it.
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