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What prime numbers are still prime when their digits are reversed?
one is 17 and 71, another one is 11,
How many two-digit prime numbers have four as one of their digits?
there are 4
In all how many two digit prime numbers have 4 as one of their digits?
3 41 43 47
What are all the prime numbers from one to one hundred?
the prime numbers are 2,3,5,7,11,13,17,19,23,29,31,37,39,43,47,53,57,59,61,67,71,73,79,81,83,89,91,93,97,
How many two digits numbers having 1 as one digits are prime numbers?
They are: 11 13 17 19 31 41 61 and 71 which makes 8 of them
A prime number times another prime number is?
If you multiply two prime numbers, the product (result) will be a composite number, not a prime number. A prime number has exactly two factors, 1 and itself. The product of two prime numbers will have those two numbers as factors, as well. The sum of two prime numbers might be prime if one of those two numbers is 2, the only even prime number, but otherwise it will not be a prime because two odd numbers will have an even sum, which means it is divisible by 2. Examples: 2 + 3 = 5 (prime) 3 + 7 = 10 (not prime) 13 + 17 = 30 (not prime) If you multiply two prime numbers, the sum of the digits of the product might or might not be prime. Examples: 2 x 7 = 14, sum of digits is 5 (prime) 2 x 11 = 22, sum of digits is 4 (not prime) 3 x 5 = 15, sum of digits is 6 (not prime) 3 x 7 = 21, sum of digits is 3 (prime) 5 x 7 = 35, sum of digits is 8 (prime)
What is the greatest prime numbers?
The largest known prime is (2 to the power of 43112609) -1 written out in full would take 13 million digits. The largest prime is an infinate number. it consists 12978189 digits. it is also known as "m43112609".
What do you notice in the prime numbers between 1-60 greater than 3?
All the prime numbers greater than 3 that are between 1-60 end in 1, 3, 5, or 7, are either one or two digits in length, and are odd numbers.
Why are all the prime numbers are odd numbers?
All prime numbers are not odd numbers. 2 is an even prime number, and it is the only even prime number because all other even numbers have 2 as one of their factors.
If I have three numbers that are 97 83 and 89 which one is prime?
These numbers are ALL prime.
What are numbers after one that are composite and prime numbers?
All numbers greater than one are positive integers that are either composite or prime numbers.
What number can multiply all numbers or digits?
the number one.
