21 October 2024

Belphigor's Prime


I had briefly mentioned Belphigor's Prime in a linkdump seven years ago, then found it again today while looking for something else, and decided it was worth reposting.
Belphegor's prime is the palindromic prime number 1000000000000066600000000000001, a number which reads the same both backwards and forwards and is only divisible by itself and one...

The number itself contains superstitious elements that have given it its name: the number 666 at the heart of Belphegor's prime is widely associated as being the number of the beast... This number is surrounded on either side by thirteen zeroes and is 31 digits in length (thirteen reversed)...

In the short scale, this number would be named "one nonillion, sixty-six quadrillion, six hundred trillion one".
Useful information for filling in any awkward conversation gaps during Halloween parties.  The symbol for it is an inverted pi.

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