Late mathematician Shakuntala Devi was awarded a long-awaited Guinness World Records certificate for “fastest human computation” on Thursday, a day before the release of her biopic starring Vidya Balan.

On June 18, 1980, Shakuntala Devi achieved the fastest human computation record in 28 seconds after she correctly multiplied two randomly selected 13-digit numbers at the Imperial College London, UK.

Shakuntala’s daughter Anupama Banerji, who was 10-year-old when her mother made the world record, received the posthumous certificate.

“Wherever I went, all people would speak about was that record. So I knew it was a huge achievement worldwide. I remember going to the Trocadero Centre (an entertainment complex on London’s Coventry Street). They have a room there which had mummy’s picture. It was fantastic,” she told PTI.

FIlm ‘Shakuntala Devi’, directed by Anu Menon, started streaming on Amazon Prime Video on Friday.

Vidya, who plays Shakuntala in the film, revealed how she with support of producer Vikram Malhotra and the Amazon team helped Banerji get a posthumous certificate for her mother.

“While shooting for ‘Shakuntala Devi’ in London, we would meet Anupama Banerji often. In my conversations with her, I realised that the late Shakuntala Devi didn’t have an official certification from Guinness World Records – it wasn’t the norm then. Vikram Malhotra (producer) and I were, therefore, very keen to make this happen and along with the Amazon team, we reached out to the Guinness World Records team who provided us with every support,” Vidya said in a statement.