Alfred's Serif Users' Forums — A large prime number

Re: A large prime number

null@example.com (William) — Sat, 26 Oct 2024 18:11:04 +0000

Answers to the puzzles.

The new number is 2^136,279,841 – 1

So, in binary notation that number is a sequence of 136,279,841 of the symbol 1

There are no zeros in that sequence.

as 2^n - 1 can be expressed in binary notation as a sequence of n of the symbol 1

For example 2^3 - 1 is 8 - 1 which is 7 and 7 in binary is 111

There are no zeros in that sequence.

For example 2^4 - 1 is 16 - 1 which is 15 and 15 in binary is 1111

There are no zeros in that sequence.

William

Re: A large prime number

null@example.com (William) — Thu, 24 Oct 2024 13:47:12 +0000

William wrote:

Some puzzles for those of us who enjoy such stuff.
How is that prime number expressed in binary notation?
How many zeros are there in that binary expression of that prime number?

Has anyone tried these puzzles?

William

Re: A large prime number

null@example.com (Alfred) — Thu, 24 Oct 2024 05:39:22 +0000

William wrote:

> Largest known prime number, spanning 41 million digits, discovered by amateur mathematician using free software
https://www.msn.com/en-gb/entertainment … r-AA1sJUcY

The original Live Science article is here:

https://www.livescience.com/physics-mat … e-software

I wonder why MSN classifies this as ‘entertainment news’!

Re: A large prime number

null@example.com (William) — Wed, 23 Oct 2024 21:43:19 +0000

Some puzzles for those of us who enjoy such stuff.

How is that prime number expressed in binary notation?

How many zeros are there in that binary expression of that prime number?

A large prime number

null@example.com (William) — Wed, 23 Oct 2024 21:34:38 +0000

> Largest known prime number, spanning 41 million digits, discovered by amateur mathematician using free software

https://www.msn.com/en-gb/entertainment … r-AA1sJUcY