The Grand Megisiduon or A-oogra is equal to M(3,4)=M(Grand Megision,3), using the Hyper-Moser notation M(m,n) for m inside n+2-gon in Steinhaus-Moser notation. The term was coined by Aarex Tiaokhiao. In the up-arrow notation Grand Megisiduon is between \(3 \uparrow^{4} 4\) and \(3 \uparrow^{4} 5\).