top button
Flag Notify
    Connect to us
      Site Registration

Site Registration

Is this number prime or composite - 1111.....1 (77 1's)

0 votes
198 views

Is this number prime or composite - 1111.....1 (77 1's)

Note: Provide the explanation...

posted Mar 31, 2017 by anonymous

Share this puzzle
Facebook Share Button Twitter Share Button LinkedIn Share Button

1 Answer

0 votes

it is a prime number

answer Apr 1, 2017 by Kewal Panesar
Try from 11



Similar Puzzles
0 votes

Prime number 31 can be expressed in the form n^5 -1, where n=2. Are there any other primes that can be expressed this way?

0 votes

Write 0 and then concatenate the prime numbers in increasing sequence i.e. 0.2357111317192329...
Is this number rational or irrational?

Note: Give your reasoning also...

...