Meaning of semiprime | Babel Free

Definitions

A natural number that is the product of two (not necessarily distinct) prime numbers.

Equivalents

Examples

“Again, to be perfectly clear, we are looking for c values that produce⟳ a low density of semiprimes when employing Euler's basic polynomial but changing the c values, in the range of x=1 to 10000. Some very early standouts are: c=4 which produces 799 semiprimes; c=6 which produces 532 semiprimes; c=12 which produces only 431 semiprimes; c=18 which produces 364 semiprimes, and c=30 which produces only 320 semiprimes.”

“2015, Jie Wang, Zachary A. Kissel, Introduction to Network Security: Theory and Practice, Wiley [under licence from Higher Education Press⟳], page 113, Firstly, we should change⟳ semiprimes from time to time, where a particular semiprime should only be used in a time interval shorter than the time required to factor an RSA challenge⟳ number⟳ of a similar length. Secondly, we should use⟳ semiprimes that consist⟳ of more than 200 decimal digits.”

“In this paper I will define⟳ four sequences of numbers obtained through concatenation, definitions which also use⟳ the notion of “sum of the digits of a number⟳”, sequences that have⟳ the property to produce⟳ many primes, semiprimes and products of very few prime factors.”

CEFR level