Largest known sphenic number

The largest known MathWorld, Sphenic Number is equal to \((2^{74,207,281} − 1)(2^{77,232,917} − 1)(2^{82,589,933} − 1) \approx 2.090119 \times 10^{70,450,089}\); the factors are the three largest known primes.
== Sources ==
Category:Numbers
Category:Class 3
Category:Non-powers
Category:Numerical records
Category:Odd numbers
Category:Lower class 3
Category:Dynamic googolisms
ru:Наибольшее известное сфеническое число