# Titanic Prime whose Digits are all 0 or 1/Historical Note

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## Historical Note on Titanic Prime whose Digits are all 0 or 1

According to David Wells in his *Curious and Interesting Numbers, 2nd ed.* of $1997$, this titanic prime was discovered by Harvey Dubner in $1984$, but this has not been corroborated.

At the time it was the largest such prime number known.

It needs to be investigated whether this record has been broken since then.

## Sources

- 1997: David Wells:
*Curious and Interesting Numbers*(2nd ed.) ... (previous) ... (next): $10^{641} \times \paren {10^{640} - 1} \mathop / 9 + 1$