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1,2,13,27,41,56,63,67,68,70,72,79,80 combination: Prime: odd: even:
Total number: 27, 56, 63, 68, 70, 72, 80
Prime number: 2,12,41,67,79
Odd number: 1,13,27,41,63,67,79
Even number: 2,56,68,70,72,80
How many digits does the product 2516 (16th power of 25) * 238 (38th power of 2) have?
25^16*2^38=2^6*(25*2*2)^16=64*100^16;
So 16 * 2 + 2 = 34 bits
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