エラトステネスの篩 でしょう
eratosutenesuno furuideshō
1. Probably the Sieve of Eratosthenes.
Noun
#345406
1. Probably the Sieve of Eratosthenes.
1. antiquity; ancient times
1. shivering (with cold); trembling (with fear)
1. stale; old fashioned
1. worn-out shoes; worn-out socks
1. it seems; I think
2. right?; don't you agree?
1. Prone to; Tending to
1. Seems likely; Appears to be preparing to
1. To exert oneself fully; To do one's utmost