The numbers 13 and 29 are prime - the one composite number in that list is 27.
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29 is the next prime number after 27. But 27 is not a prime! 3 x 9 = 27!
'29' is a prime . The other are composite 9 = 3 x 3 22 = 11 x 2 27 = 9 x 3 '29' being a prime , cannot be split up like the other numbers.
prime numbers above 13 = 17, 19, 23, 29, 31,...
25 = 5 x 5 27 = 3 x 9 29 is prime
23 and 29 are prime numbers