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Meaning of Chen prime | Babel Free

Noun CEFR B2

Definitions

Any prime number p such that p+2 is either a semiprime or another prime.

Examples

“2013, Laura Hemphill, Buying In, Haughton Mifflin Harcourt (New Harvest), page 278, She tried counting Chen primes. 2, 3, 5... 7, 11... 13... 17... She couldn't concentrate.”

“There are even magic square of primes, like this one containing Chen primes discovered by Rudolf Ondrejka:[…]”

“A prime number p is called a Chen prime if p + 2 is either a prime or a product of two primes.[…]There are infinitely [many] Chen primes and the first ten are: 2, 3, 5, 7, 11, 13, 17, 19, 23 and 29.”

CEFR level

B2

Upper Intermediate
This word is part of the CEFR B2 vocabulary — upper intermediate level.

See also

Chen-chiang Chen's theorem Chena Chenab Chenab Valley Chenabi