Find 5 and more semi-primes such thatÂ sum and difference of each two terms are semi-primes. First such sets of 4 semi-primes are: s1 = {4, 10, 63947, 63951}, s2 = {4, 10, 76799, 76803}, s3 = {4, 10, 97239, 97243}.I don't know answer:(