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85 (another Prime Pages' Curiosity) |
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(8511 - 85)/11 ± 1 are twin primes. [Luhn] Between 641 and 114689 (the second smallest Fermat divisor) there exist 85 prime numbers that could conceivably be Fermat divisors. There are 85 five-digit primes that begin with 85. [Bopardikar]
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