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A365598
Near-repdigit primes with at least two 9's as the repeated digit.
9
991, 997, 99991, 9999991, 99999999999999997, 999999999999999999999999999999991, 999999999999999999999999999999999999999999991
OFFSET
1,1
LINKS
EXAMPLE
99991 is a term because all digits are equal to 9 except the last one.
KEYWORD
base,nonn
AUTHOR
Robert Price, Sep 10 2023
STATUS
approved