primes in pi: 1, 2, 6, 38, 16208, 47577, 78073, ...

Eric W. Weisstein eric at
Mon Jul 17 15:42:54 CEST 2006

Anyone curious about prime number searches may be (slightly) interested to 
learn that the concatenation of the first 78073 digits of pi (including 
the initial 3) forms a probable prime.  For the complete list of known 
indices of primes in the digits of pi (as listed above), see

I believe at 78073 digits, pi(78073) becomes the 65th largest known PRP 


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