Heads-Pentprimol (also Tails-Pentprimol) is a number equal to R(5) and Я(5) using Primarial Functions. It's also equal to 11# and its decimal value is 2,310. The term has been coined by Licorneuhh[1]


Notation Lower bound Upper bound
Scientific notation \(2.31\times10^3\)
Arrow notation \(48\uparrow2\) \(7\uparrow4\)
Steinhaus-Moser Notation 4[3] 5[3]
Copy notation 2[4] 23[2]
Bashicu matrix system (0)[48] (0)[49]
Pound-Star Notation #*(48)*2 #*(7)*4
BEAF {48,2} {7,4}
Hyperfactorial array notation 6! 7!
Fast-growing hierarchy \(f_2(8)\) \(f_2(9)\)
Hardy hierarchy \(H_{\omega^2}(8)\) \(H_{\omega^2}(9)\)


  1. Numbers | Licorneuhh's numbers site (retrieved at UTC 16:39 12/02/2021)
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