In the initial comment five values are stated to be not divisible by 3, 5, 7, and 11. That is true for 1 and 3160 but not for 2, 10, and 3159:
The last base-3-digit of 2 is 2. The last base-11-digit of 10 is 10. The last base-5-digit 3159 is 4.
Or check these facts:
2 and 3159 are not in the sequence A030979 (mentioned in the bibliography).
2, 10, and 3159 are not valid for problem (2)
In the initial comment five values are stated to be not divisible by 3, 5, 7, and 11. That is true for 1 and 3160 but not for 2, 10, and 3159:
The last base-3-digit of 2 is 2. The last base-11-digit of 10 is 10. The last base-5-digit 3159 is 4.
Or check these facts:
2 and 3159 are not in the sequence A030979 (mentioned in the bibliography).