5
23 or 41
16
73 7-3 = 4 73 is prime and 37 is prime.
On Jan. 25, 2013 the largest known prime number, 257,885,161-1, was discovered on Great Internet Mersenne Prime Search (GIMPS) volunteer Curtis Cooper's computer. The new prime number, 2 multiplied by itself 57,885,161 times, less one, has 17,425,170 digits.
On Jan. 25, 2013, the largest known prime number, 257,885,161-1, was discovered on Great Internet Mersenne Prime Search (GIMPS) volunteer Curtis Cooper's computer. The new prime number, 2 multiplied by itself 57,885,161 times, less one, has 17,425,170 digits.
The new prime number, 2 multiplied by itself 57,885,161times, less one, has 17,425,170 digits.
Any prime number that has 0 as one of its digits, such as 101, 103, 107 or 109.
'17' is a prime number. The sum of the digits is 1 + 7 = 8 > 7.
23
17
The four numbers are: 113, 131, 151 and 191. For the product of the digits to be prime, the number must contain 2 ones - which greatly simplifies the exercise.
23 or 41
73
16
47 + 74 = 121
43
73 7-3 = 4 73 is prime and 37 is prime.