2p^2 - 1 is prime????
Algebra
Level
pending
2, 3, 7, 11, 13, 17, 41, 43, 59, 73, 109, what is the sum of the two next numbers of the sequence?
The answer is 240.
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1 solution
the next two number are 113 and 127. this is sequence of prime number such that 2p^2 - 1 is also a prime