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Showing results for tags 'prime numbers'.
https://math.stackexchange.com/questions/3297805/all-prime-numbers-within-2-columns-of-number-pyramid-proof The more I look at it, the more amazing it is. How wild is it that the numbers that should be primes are multiples of 5 or 7? except for 121 ..that 121 is the only row that doesn't have a prime in either column Primes have just been solved ..this is unbelievable.