Korean Journal of Mathematics

The Kangwon-Kyungki Mathematical Society (강원경기수학회)
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REPDIGITS AS DIFFERENCE OF TWO PELL OR PELL-LUCAS NUMBERS

  • Received : 2022.07.06
  • Accepted : 2023.01.03
  • Published : 2023.03.30
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Abstract

In this paper, we determine all repdigits, which are difference of two Pell and Pell-Lucas numbers. It is shown that the largest repdigit which is difference of two Pell numbers is 99 = 169 - 70 = P7 - P6 and the largest repdigit which is difference of two Pell-Lucas numbers is 444 = 478 - 34 = Q7 - Q4.

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References

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