Well, they don't really end most people say it's Infinity so it probably is
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They end in: 0,2,4,6, and 8.
They never end but they also end at a zillion but a zillion is in the middle of the numbers
No, there are composite numbers that end in every other digit.
Irrational numbers.
Other than 2, no prime numbers are even. So prime numbers can't end in even numbers. After 5, no prime number can end in 5. After 5, all prime numbers end in 1, 3, 7 or 9.