Largest known Cullen prime

The largest known is equal to 6,679,881 × 26,679,881 + 1, which is 2,010,852 digits long; it has been discovered on August 4, 2009.The Top Twenty: Cullen primes
==Approximations in other notations==
For 6,679,881 × 26,679,881 + 1: 2.3617539 × 102010851
Notation 	Lower bound 	Upper bound
Scientific notation 	\(2.361\times10^{2010851}\) 	\(2.362\times10^{2010851}\)
Up-arrow notation 	\(10 \uparrow\uparrow 2.7\) 	\(10 \uparrow\uparrow 2.8\)
Chained arrow notation 	\(10\rightarrow2010851\) 	\(10\rightarrow2010852\)
Bowers' Exploding Array Function	{10, 2010851} 	{10, 2010852}
Steinhaus-Moser Notation 	6[3][3] 	7[3][3]
Fast-growing hierarchy 	\(f_2(f_2(18))\) 	\(f_2(f_2(19))\)
Slow-growing hierarchy 	\(g_{\omega^{\omega^6}}(10)\)	\(g_{\omega^{\omega^7}}(10)\)
Hyper-E notation 	E2010851 	E2010852
Hyperfactorial array notation 	(9!)! 	(10!)!
== Sources ==
Category:Numbers
Category:Class 3
Category:Lower class 3
Category:Numerical records
Category:Prime numbers
Category:Dynamic googolisms
ru:Наибольшее известное простое число Каллена