3823

This number is a prime.

+ The 266th Pillai prime is the sum of the first 23 Pillai primes. Curiously, 23 is the smallest Pillai prime: 23 + 29 + 59 + 61 + 67 + 71 + 79 + 83 + 109 + 137 + 139 + 149 + 193 + 227 + 233 + 239 + 251 + 257 + 269 + 271 + 277 + 293 + 307 = 3823. [Post]

(There is one curio for this number that has not yet been approved by an editor.)

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