The name "Euler prime" is used here for a prime number generated by Euler's prime-generating
polynomial
for a nonnegative integer
. (Note that such primes are
distinct from prime Euler numbers, which are
known here as Euler number primes). Then the
first few Euler primes occur for
, 1, 2, ..., 39, 42, 43, 45, ... (OEIS A056561),
corresponding to the primes 41, 43, 47, 53, 61, 71,
83, 97, 113, 131, 151, 173, ... (OEIS A005846).
As of Feb. 2013, the largest known Euler prime is , which has 398204 decimal
digits and was found by D. Broadhurst (https://t5k.org/primes/page.php?id=111195).