Not to be confused with Ball bearing. Bearing balls are special highly spherical and smooth balls, most commonly used in ball bearings, but also used as components in things like freewheel mechanisms. The balls come in many different grades.
Euler Prime. Let a prime number generated by Euler's prime-generating polynomial be known as an Euler prime. Then the first few Euler primes occur for , 2, ..., 39, 42, 43, 45, ... (OEIS A056561), corresponding to the primes 43, 47, 53, 61, 71, 83, 97, 113, 131, 151, 173, ... (OEIS A005846).
Euclid proved centuries ago that there is an infinite number of primes, but no oneâs ever found a formula to find them, so the process of seeking them out in numbers so large is a tedious one. So tedious that itâs taken four years to beat the previous largest-known prime. The previous largest-known prime was 243,112,609 â 1, which when written out is a little under 13 million digits long, but 257,885,161 â 1 just crushed it, coming in at 17 million digits long.