OFFSET
1,1
LINKS
Robert Israel, Table of n, a(n) for n = 1..10000
EXAMPLE
For the prime quadruple 3,5,7,11, 5^x-3^x == 7 (mod 11) has no solutions.
MAPLE
Res:= NULL: count:= 0:
p1:= 2: p2:= 3: p3:= 5: p4:= 7:
while count < 100 do
found:= false;
for x from 1 to p4-2 do
if p2 &^ x - p1 &^ x - p3 mod p4 = 0 then found:= true; break fi
od:
if not found then Res:= Res, p1; count:= count+1 fi;
p1:= p2: p2:= p3: p3:= p4: p4:= nextprime(p4);
od:
Res; # Robert Israel, Mar 18 2018
CROSSREFS
KEYWORD
easy,nonn
AUTHOR
Cino Hilliard, May 11 2003
EXTENSIONS
Name clarified by Robert Israel, Mar 18 2018
STATUS
approved