Mersenne numbers of the form 2ᵐ-1 are well known examples, but they are not useful for cryptography because there are only a few primes (the first Mersenne primes are 3, 7, 31, 127, 8191, 131071, 524287, 2147483647, etc).

The iewels and the treaſure we haue tane Shall be reſeru’d, and you in better ſtate, Than if you were arriu’d in Siria, Euen in the circle of your Fathers armes, The mightie Souldan of Ægyptia.

They rightly say that attacks against prostitute women are common and that it's only when five are murdered in one place that it starts to provoke debate.

The boy and girl taking their cue from us also fail to put first things first and we find them falling by the wayside because our sense of relative values failed to function.