0
Still curious? Ask our experts.
Chat with our AI personalities
RossEvery question is just a happy little opportunity.
Chat with Ross
BeauYou're doing better than you think!
Chat with Beau
JordanLooking for a career mentor? I've seen my fair share of shake-ups.
Chat with JordanAdd your answer:
Earn +20 ptsQ: Why do all prime numbers end in 397 or 1?
Write your answer...
Submit
Still have questions?
Continue Learning about Math & Arithmetic
What do all prime numbers end with?
After 5, all prime numbers end with 1, 3, 7 or 9.
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.
What are all the prime numbers that end with a 7?
no
Why can a prime number not have 0 in it?
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.
Why are 5 and 2 the only prime numbers that end in a 5 or a 2?
All numbers larger than 5 which end in 5 are divisible by 5 and so are not prime. All numbers larger than 2 which end in 2 are divisible by 2 and so are not prime.
Trending Questions
What is the area of a square that has sides 10 centimeters in length?
What is his percent of decrease if a football player gained 1200 yards last season and 900 yards this season?
Is purgatory a biblical place?
What is difference between period and mensuration?
What is the simplest form of 40 and 64?
What is five times 90?
What does 1 inch look like?
Is 412 divisible by 2?
What three numbers add up to 33?
How do you calculate how much you get paid a week?
What is a trinom?
Does an employer have to pay time-and-one-half pay when an employee works in excess of 40 hours in a week or eight hours in a day?
What is the effect of the earthquake?
How much is 15 killometers?
What is 25 percent off of 90?
What does a 1 to 1 phenotypic ratio in a test cross indicate?
What is the size of angled parking?
What does 1 step equation mean in math?
What is 5 over 6 plus 3 over 8?
How many miles is equal to 6km?
Copyright ©2025 Infospace Holdings LLC, A System1 Company. All Rights Reserved. The material on this site can not be reproduced, distributed, transmitted, cached or otherwise used, except with prior written permission of Answers.