5^2 = 25
(5 - 1)! + 1 = 4! + 1 = 24 + 1 = 25
25 divides 25 and so 5 is a Wilson prime.
13^2 = 169
(13 - 1)! + 1 = 12! + 1 = 479001600 + 1 = 479001601
169 divides 479001601 (= 2834329) so 13 is a Wilson prime.
there are 13 primes not 5.
2 x 2 x 5 x 13
There are for pairs of co-primes between 1 and 25. They are (3, 5), (5, 7), (11, 13), and(17, 19).
Well, to begin with, 2 and 3 are not twin primes. The first twin primes are 3 and 5, but then 5 and 7 are also twin primes. After that, it's 11 and 13, then 17 and 19, 29 and 31, and 41 and 43. Twin primes are distinguished by having a difference of 2 between them.
17, it's the sequence of primes.
there are 13 primes not 5.
16 = 1+15, 3+13, 5+11, 7+92,3,5,7,11,13 are primes < 1616 = 3+13 or 5+11
65 = 5 x 13
It is: 5 times 13 = 65
2 x 2 x 5 x 13
Actually, 13 and 15 are not twin primes because twin primes are pairs of prime numbers that have a difference of 2 between them. In this case, 13 is a prime number, but 15 is not a prime number because it can be divided by 3 and 5 in addition to 1 and itself. Therefore, 13 and 15 do not meet the criteria to be considered twin primes.
The odd primes less than 20 are: 3 5 7 11 13 17 19
Yes, 5 and 7, and 11 and 13
As a product of its prime factors: 5 times 13 = 65
There are for pairs of co-primes between 1 and 25. They are (3, 5), (5, 7), (11, 13), and(17, 19).
-3&5 -5&7 -11&13 -17&19 -29&31
Not sure what phytagorean primes are.The Pythagorean primes in the required range are: 5, 13, 17, 29, 37, 41, 53, 61, 73, 89, 97.