You'll have to actually look up the prime numbers in a table of prime numbers and carry out the multiplication - I don't think there is a quick shortcut. However, you can discard all digits except the two rightmost digits - if you don't, your calculator will discard the last digits. Here is how you start:
2 x 3 = 6
6 x 5 = 30
30 x 7 = 210 (you can discard the 2, leaving only the "10")
10 x 11 = 110 (only keep "10")
10 x 13 = 130 (only keep "30")
13 x 17 = ...
There are only two prime numbers that are consecutive numbers, 2 and 3. Their product is 2 x 3 = 6. The first prime numbers are 2, 3, 5, and 7 and the only two consecutive prime numbers whose product is a single digit are 2 and 3. (The next two consecutive prime numbers, 3 and 5, have a two-digit product.)
679 is the product of the largest single-digit prime number and the largest two-digit prime number.
You had me until "product." The product of 4 digits can't be prime.
The first five two-digit prime numbers are 11, 13, 17, 19, and 23.
The answer is vague but correct . Take any two prime numbers whose combined digit length is 501 and their product will generate a 500 or a 501 digit number.
There are only two prime numbers that are consecutive numbers, 2 and 3. Their product is 2 x 3 = 6. The first prime numbers are 2, 3, 5, and 7 and the only two consecutive prime numbers whose product is a single digit are 2 and 3. (The next two consecutive prime numbers, 3 and 5, have a two-digit product.)
679 is the product of the largest single-digit prime number and the largest two-digit prime number.
non-prime no.
You had me until "product." The product of 4 digits can't be prime.
0 Look at the product of the first 3 prime numbers: 2 x 3 x 5 = 30. Any number multiplied by 30 will have a 0 in the units digit. So, no matter how many prime numbers you are multiplying, if once you have a number ending in 0, all of the rest will end in 0.
The first five two-digit prime numbers are 11, 13, 17, 19, and 23.
The ones digit in the product from multiplying the 305 prime numbers less than 2012 is 0 because the ones digit becomes 0 after 2 and 5 have been multiplied and remains unchanged after more prime numbers are multiplied.
It is 0. Two of the first 51 prime numbers are 2 and 5, whose product is 10. When you multiply 10 by any other whole numbers, the final digit (in the ones place value) will be 0.
The greatest two-digit prime number is 97. The lowest two-digit prime number is 11. The product of the two numbers is equal to 1067.
The first three prime numbers containing the digit 7 are:7, 17, 37
11 and 13.
The answer is vague but correct . Take any two prime numbers whose combined digit length is 501 and their product will generate a 500 or a 501 digit number.