No.
The quotient.
You end it when all the numbers are prime.
Quotient.
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.
Lots of prime numbers have zeros in them. 101, 103, 107 and 109 are all prime numbers. Prime numbers can't end in zero. Numbers that end in zero are multiples of ten and have too many factors to be prime numbers.
No.
No. If they end in 4, they are even numbers and divisible by 2, and therefore are not prime.
After 5, all prime numbers end with 1, 3, 7 or 9.
Yes. Since 7 is a prime number, you have found all the prime numbers, with 7 being the final prime factor.
An infinite number of prime numbers contain one or more zeroes, though a prime number, always being odd, cannot end in a zero. The first four prime numbers containing zeroes are 101, 103, 107 and 109.
they end whith what
Two and five!