a man of a square frame

Released at the zenith of teenyboppers' Leomania, Mask casts DiCaprio as evil and saintly twins, a dual role that was a royal pain for some critics.

Featurewise, Tiffany and her mother were dead ringers, but Tiffany always did interesting things to her hair.

Suppose that a Proth number n=k2ʳ+1 satisfies the condition that a/2)≡-1(mod n) for some integer a. Prove that n is prime.