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102 (another Prime Pages' Curiosity) |
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102 = 2 x 3 x 17. The number and sum of its digits is equal to the number of its different prime factors. It is the smallest 3-almost prime with this property. [Capelle] 102+prime(102) and 102*prime(102)-1 are primes with prime lengths. [Firoozbakht] 102 is the smallest number m such that m times m ones minus one is prime, i.e., 102*111...1(102 ones) - 1 is prime. [Firoozbakht]
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