梅森素数 méi sēn sù shù

DEFINITIONS

  1. Mersenne prime number (math.)

CHARACTERS

梅 méi plums; prunes; surname
森 sēn
HSK 4
forest; luxuriant vegetation
素 sù
HSK 5
white (silk); plain; vegetarian; formerly; normally
数 shù
HSK 3
number; several, count; fate