My Math Forum  

Go Back   My Math Forum > Welcome > New Users

New Users Post up here and introduce yourself!

LinkBack Thread Tools Display Modes
September 21st, 2018, 09:56 AM   #1
Joined: Sep 2018
From: tunis

Posts: 27
Thanks: 0

How to generate prime numbers without the sieve of Eratosthenes??

Looping aⁿ⁻¹ mod n=1
The output is Primes and pseudo Primes (carmichael)
After (a being the base), tested that the algo works only if a = (n-1).
for exemple
1^7mod 7=1
2^7mod 7=1
3^7mod 7=1
4^7mod 7=1
5^7mod 7=1
6^7mod 7=1

1^9mod 9=1
2^9mod 9=4
3^9mod 9=0
4^9mod 9=7
5^9mod 9=7
6^9mod 9=0
7^9mod 9=4
8^9mod 9=1
not prime

With this method the calculation becomes long.
Ak23 is offline  

  My Math Forum > Welcome > New Users

eratosthenes, generate, numbers, prime, sieve

Thread Tools
Display Modes

Similar Threads
Thread Thread Starter Forum Replies Last Post
Searching Win prgm to generate and check prime numbers pstein Number Theory 2 September 12th, 2017 08:44 PM
Tricky way to generate huge list of prime numbers mobel Number Theory 9 September 26th, 2015 05:54 AM
sieve of prime form 12 * i + 5 miket Number Theory 1 April 29th, 2014 06:42 AM
Quick Question Regarding Prime Sieve Marcel777 Number Theory 6 December 27th, 2010 01:47 PM
is this faster than the Eratosthenes sieve !? zander_hack Number Theory 33 February 10th, 2009 01:35 PM

Copyright © 2019 My Math Forum. All rights reserved.