
Curios:
Curios Search:
Participate: 
The first Human Genome Project online download contained a 739 megabyte file. The smallest prime number that is the sum of distinct primes beginning and ending with the digit three (739 = 3 + 353 + 383). [Capelle] The smallest prime (emirp) that can be expressed as a sum of powers with the four prime digits as bases and exponents, i.e., (2^7+3^5+5^2+7^3). [Loungrides] The smallest emirp that has a maximum product of digits for a prime sum of digits. [Loungrides] The start of five consecutive emirps in the sequence of Ulam primes, i.e., 739, 751, 983, 991, 1103. [Loungrides] 7^39 is a 33digit number without a 7 in it. Can you find a larger power of 7 without the digit 7 in it? [Loungrides]
(There are 4 curios for this number that have not yet been approved by an editor.)
Prime Curios! © 20002018 (all rights
reserved)
privacy statement
