The Project Gutenberg EBook of The First 100,000 Prime Numbers, by Unknown
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Title: The First 100,000 Prime Numbers
Author: Unknown
Release Date: June 20, 2008 [EBook #65]
Language: English
*** START OF THIS PROJECT GUTENBERG EBOOK THE FIRST 100,000 PRIME NUMBERS ***
The First 100,000 Prime Numbers
This file contains the first 100,000 primes as well as the C program (frightfully primitive as it may be) which is used to calculate them. They were calculated at using a Cray X-MP.
***Program Begins***
#include "stdio.h" #include "math.h"
int number;
main(){printf("Which number do you wish to start the test with? ");scanf("%d",&number);printf("\n");printf("I'm starting with number %d\n",number);if (number<1) number=1;if (number==1) printf("1\n");if (number<=2) printf("2\n");if (!(number % 2)) number++;if (number==1) number=3;do{if (isprime(number)) printf("%d\n",number);number+=2;}while (1) ;}
isprime(int thenumber){int isitprime=1,loop;for(loop=3 ; (isitprime) && (loop<(sqrt(thenumber)+1)) ; loop+=2)isitprime = (thenumber % loop);return(isitprime);}
***Program Ends***
The Project Gutenberg Etext of The First 100,000 Prime Numbers
[1 is not a prime by many definitions of prime]