7

This number is a prime.

Just showing those entries submitted by 'Sirag': (Click here to show all)

The Hamming-7 code is a perfect error-correcting code of word-length 7, with 4 message carrying bits and 3 error-correcting bits. [Sirag]

7 is the 3rd lucky number. It is also the rank of the E7 Lie algebra (E6 and E8 are the only other E-type Lie algebras). [Sirag]

There are 7 hidden dimensions in 11-d Supergravity, which is the "low energy" approximation to M theory, which also has 7 hidden dimensions. [Sirag]