Of the numbers 1,3,7,8,15,17,22,27,36,39,41,46,49 and 51, 5 of those are prime.
1,3,7, 17 and 41 are prime in this list.
The numbers 11, 13, 17 and 19 are prime.
The prime factorization of 340 is 22 * 5 * 17.
The prime numbers from 1 to 22 are 2, 3, 5, 7, 11, 13, 17, and 19.
The prime numbers that are less than 22 are 2, 3, 7, 11, 13, 17, 19.
They are: 2, 17, 3, 7 and 31
Two prime numbers such that their sum is 22:- i) 19 and 3 ii) 17 and 5 If we don't consider the prime numbers to be distinct then 11 and 11 is also a solution.
11, 13, 17 and 19
Prime numbers: 11, 13, 17, 19, 23, 29 Composite numbers: 10, 12, 14, 15, 16, 18, 20, 21, 22, 24, 25, 26, 27, 28, 30
2 x 2 x 17 = 68 or 22 x 17 = 68
1292 = 22 x 17 x 19
There are an infinite number of square numbers and prime numbers whose sums are a prime number. Examples are 202 + 103 = 503, 22 + 13 = 17, 102 + 601 = 701, 22 + 163 = 167, 42 + 141 = 157, etc.
2,4,6,8,10,12,14,15,16,18,20,21