31415
This number is a composite.
The first sphenic number in the decimal expansion of π. [Gupta]
Pi-culiar
primes: 653 (3-digits), 701...303
(31-digits), 628...637
(314-digits), 501...651 (3141-digits), etc. The first
31415-digit prime number occurring in the decimal expansion
of π is unknown.
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