|
%I #9 Apr 16 2021 03:56:41
%S 5,13,73,73,1801,1801,2521,2521,15121,15121,15121,15121,55441,55441,
%T 1108801,14414401,43243201,43243201,43243201,43243201,43243201,
%U 367567201,367567201,367567201,13967553601,13967553601,13967553601,13967553601,13967553601,13967553601
%N Smallest prime == 1 mod first n composite numbers.
%e a(5) = 1801 is the smallest prime p such that p-1 is divisible by 360, the least common multiple of first 5 composite numbers 4,6,8,9 and 10.
%o (PARI) (with -p10^8): n=1:v=vector(50,k,n=n+1:while(isprime(n),n=n+1):n):n=5:for(k=1,50,g=0:forprime(p=n,10^8,f=0:for(l=1,k,if((p%v[l])>1,f=1:break)): if(f==0,n=p:g=1:break)): if(g==1,print1(n","),print1("-,")))
%K nonn
%O 1,1
%A _Amarnath Murthy_, Sep 08 2002
%E More terms from _Ralf Stephan_, Mar 20 2003
%E a(22)-a(30) from _Amiram Eldar_, Apr 16 2021
|
