5
This number is a prime.
Single Curio View: (Seek other curios for this number)
Amateur mathematician Aubrey D.N.J. de Grey constructed a
unit-distance graph which cannot be colored with fewer than
5 colors.
Submitted: 2019-04-19 21:26:26; Last Modified: 2019-04-19 21:27:03.
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell