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As of 2015, the longest Prime number known ends in 1.
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Earn +20 ptsQ: What number does the longest prime number end in?
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What number's cant a prime number end in why?
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.
How do you know when you have found the longest possible factor string of a number?
When all of the numbers are prime.
Is 130 a prime number?
No prime numbers end in 0. 130 is a composite.
Is 4539 prime?
no because it has an "odd" number at the end of it. if it had a 2, 4, 6 ,8 at the end. then it would be prime
What number up to 100 has the most prime numbers?
64 and 96 have the longest prime factorizations in that range. If you're asking about distinct prime factors, quite a few are tied with three.
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