De Bruijn–Newman constant is a mathematical numerical constant defined via the zeros of a certain functions. It is denoted by the symbol Λ. The constant is named after Nicolaas Govert de Bruijn and Charles M. Newman. It is closely related to the Riemann's Hypothesis. The value has been changed since years. In 1988, it was equal to -50, It started increasing and in the year 2000, it was equal to −2.7×10-9. Since 2011, it is −1.1×10-12.