753266429

This number is a prime.

The center column of this 9-level palindromic
prime pyramid is the emirp 753266429.

There are 5 more 9-level palindromic prime pyramids like
this that contain a prime number (starting with '7')
down the center column.
Can you find them?

7
757
77377
7772777
777767777
77777677777
7777774777777
777777727777777
77777777977777777

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