The book is now available! 5479
(another Prime Pages' Curiosity)
Prime Curios!
Curios: Curios Search:

+ The average of the smallest (1009) and largest (9949) 4-digit primes featured in the book "Prime Curios!: The Dictionary of Prime Number Trivia" by Chris K. Caldwell and G. L. Honaker, Jr., 2009. [Green]

+ The sum of all multidigit composite repdigit numbers less than a thousand, i.e., 22+33+44+55+66+77+88+99+111+222+333+444+555+666+777+888+999. [Loungrides]

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