15555...22221 (71-digits)
(another
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Prime Puzzio
Test Number
1
5555555555 5555555555 5558888888 8888888888 8888882222 2222222222 2222222221
A
dihedral prime
of
prime
length and
prime
sum of digits. Note also that each of the digits are repeated a
prime number
of times. [
Patterson
]
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