1056208858880824379

                                                        105620885 8880824379

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+ 1056208858880824379 is a prime that remains prime when you substitute all the digits x with 3, for x = 0 to 9, each substitution one at a time. E.g., if x = 0, then the new integer is 135623885888382437 (prime); for x = 1, the new integer is 3056208858880824379 (prime), and so on. Found by Giovanni Resta. [Rivera]

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