Neeraj Anant Pande. Digits in Units Place of 2-Prime Factors Numbers Till 1 Trillion. Int. J. Math. And Appl. [Internet]. 2018 Jan. 20 [cited 2024 May 8];6(1 - B):243-7. Available from: http://ijmaa.in/index.php/ijmaa/article/view/920