74141201
This number is a prime.
Replacing each digit of prime 74141201 with the digit's cube, a new prime is obtained up to six primes doing this
recursively: 74141201-> 343641641801->
27642721664121664151201->
834321664834381216216641812162166411251801->
5122764278121621664512276427512181216812162166415121812168121621664118125151201->
1251883432166483435121812168121621664125188343216648343125181512181216512181216812162166411251815121812165121812168121621664115121812511251801. [Bajpai]
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