Ultraprimorial
The function defined by U(p)=(p#)^(p#), where p is a prime number and p# is a primorial. The values for p=2, 3, ..., are 4, 46656, 205891132094649000000000000000000000000000000, ... (OEIS A165812).
See also
Primorial, UltrafactorialExplore with Wolfram|Alpha
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References
Sloane, N. J. A. Sequence A165812 in "The On-Line Encyclopedia of Integer Sequences."Referenced on Wolfram|Alpha
UltraprimorialCite this as:
Weisstein, Eric W. "Ultraprimorial." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/Ultraprimorial.html