2 and 43 (they are the only ones)
50
They are: 41, 43 and 47 that have only 2 factors because they are all prime numbers
2 is the only even prime number, and it can be added to several odd numbers to make another prime number.For example:5 + 2 = 711 + 2 = 1317 + 2 = 1941 + 2 = 43
1 x 43, 43 x 1
(2 + 9) x 4 - 1 = 43
2 and 43 (they are the only ones)
86*1 43*2
50
They are: 41, 43 and 47 that have only 2 factors because they are all prime numbers
2 is the only even prime number, and it can be added to several odd numbers to make another prime number.For example:5 + 2 = 711 + 2 = 1317 + 2 = 1941 + 2 = 43
False because 41 43 and 47 are prime numbers
1 x 43, 43 x 1
1 x 43, 43 x 1
1, 2, 43, 86
43 and 2
(4!x2)+(1+3) or 43 - 12