Then, in
nearly oracular tone Ramanujan went on: «There appear to be corresponding properties,» he wrote in his 1919 paper, «in which the moduli are powers of 5, 7 or 11... and no simple properties for any moduli involving primes other than these three.»
Then, in
a nearly oracular tone, Ramanujan wrote that there should be no corresponding «simple properties» involving larger primes — in other words, there is no sequence of p (n)'s that are all divisible by 13, 17 or 19 and so on.