Prime Curios!: 431

431
(another Prime Pages' Curiosity)

Curios:

Curios Search: Participate:

Divide the prime number 431 by 510 to obtain an excellent approximation to log₁₀(7). [Kulsha]

In addition to 431 and 433 being twin primes, both the 431st and the 433rd Fibonacci numbers are prime. [Dobb]

Polaris (the North Star) is 431 light-years from Earth, according to astrometric measurements of the Hipparcos satellite.

n! is divisible by the sum of the decimal digits of n! for all numbers n from 1 to 431. Note that 431 is prime also. [Gupta]

To link to this page use http://primes.utm.edu/curios/page.php?number_id=975