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Delete any digit of 3137 and it will remain prime. [Blanchette] The smallest fourdigit prime that is comprised of two consecutive primes concatenated. [Patterson] The largest prime such that each substring is a prime or 1. [Capelle] The only prime formed from the concatenation in any order of two 2digit successive emirps. [Loungrides] 3137 is the sum of 31 consecutive primes whose first two are 31 and 37. [Silva] The only prime of form n^2+1 concatenated from two consecutive doubledigit primes, i.e., 3137=56^2+1. [Loungrides] The only Honaker prime concatenated from two doubledigit emirps. [Loungrides] The smallest of only three righttruncatable primes formed by concatenating two doubledigit emirps. The other are 3797 and 7331. [Loungrides]
(There are 4 curios for this number that have not yet been approved by an editor.)
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