57
(another
Prime Pages
' Curiosity)
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Prime Puzzio
Test Number
(57) = 2
4
and 57
57
- 2
4
is
prime
. [
Noll
]
57 x 2
2
5
- 1 is prime. [
Noll
]
100 x 2
n
+ 57 are primes for
n
= -1, 0, 1, 2, 3, 4 & 5. [
Luhn
]
Prime Curios! © 1999-2009 (
all rights reserved
)
(57) = 24 and 5757 - 24 is prime. [Noll]