* 3, 5 * 5, 7 * 11, 13 * 17, 19 * 29, 31 * 41, 43
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here are all 8, 3,5 11,13 17,19 59,61 29,31 41,43 5,7 71,73
The sum of all prime numbers less than one hundred is 1104.
The primes less than 10 are 2,3,5 and 7 with a product of 210.
There are an infinite number of pairs of prime two apart, classified as "twin primes". For lists, see the link.
472.