Modified Kaprekar Process on 4-Digit Number terminates in 2538/Historical Note
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Historical Note on Modified Kaprekar Process on 4-Digit Number terminates in 2538
This result is reported by David Wells in his $1997$ work Curious and Interesting Numbers, 2nd ed. to appear in volume $22$ Journal of Recreational Mathematics on page $34$ in an article authored by Charles Wilderman Trigg, but this has not been corroborated.
Sources
- 1997: David Wells: Curious and Interesting Numbers (2nd ed.) ... (previous) ... (next): $2538$