3511

This number is a prime.

+ The largest known Wieferich prime: 35112 divides 23511 - 1 - 1.

+ The number 92020! starts with digits 3511. [Galliani]

+ The only known Wieferich emirp. [Loungrides]

+ The smallest emirp formed by concatenating the ordered factors of a sphenic number (i.e., 165 = 3*5*11). [Loungrides]

+ sqrt(3511-15*7#) and sqrt(3511+7#) produce a pair of invertible primes, 19 and 61. [Galliani]

+ The smallest prime formed from the concatenation of the first n odd Sophie Germain primes (case n=3). [Gupta]

(There are 4 curios for this number that have not yet been approved by an editor.)

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