Rephrase this statement to make it more precise Then prove t

Rephrase this statement to make it more precise. Then prove the assertion by setting up a context for examining the sequence using modular arithmetic. In particular, consider sequence numbers mini 7 and mod 19 (and. if space permits, mod 17). In particular, determine whether the sequence will ever \"reach\" a number divisible by 7 or a number divisible by 19. Do this using basic properties of modular arithmetic, as in our discussions, and do not invoke powerful \' external\" tools.

Solution

The sequence 31, 331....33331

Consider the term in this sequence 333333331 is not prime; it is divisible by 17

Also every 15th number is divisible by 31.

Hence this sequence will not remain a prime and is unsustaibable.