This Inmate Used Solitary Confinement to Learn Math. Now He's Solving the World's Hardest Equations

In 2010, Christopher Havens was sentenced to 25 years for murder. In 2020, his work in number theory was published in an academic journal. [View in Browser]( [Popular Mechanics]( [SHOP]( [EXCLUSIVE]( [SUBSCRIBE]( [Pop Mech Pro]( [This Inmate Used Solitary Confinement to Learn Math. Now He's Solving the World's Hardest Equations]( [This Inmate Used Solitary Confinement to Learn Math. Now He's Solving the World's Hardest Equations]( In 2010, Christopher Havens was sentenced to 25 years for murder. In 2020, his work in number theory was published in an academic journal. [Read More]( [Join Now]( [The Best Portable Table Saws]( [The Best Portable Table Saws]( These compact table saws easily go where the work is: outside, in the garage, or to the job site. [Read More]( [The Best Hydro Flasks for Staying Hydrated]( [The Best Hydro Flasks for Staying Hydrated]( These seven bottles and accessories will keep your coffee hot and your water ice cold. [Read More]( [Alternate text] [Alternate text] [The Air Force Has Begun Sending the B-1 to the Boneyard]( [The Air Force Has Begun Sending the B-1 to the Boneyard]( The bomber is bound for an early retirement in the Arizona desert. [Read More]( [How the Only Successful Alcatraz Prison Break Was Torn From the Pages of Popular Mechanics]( How the Only Successful Alcatraz Prison Break Was Torn From the Pages of Popular Mechanics]( In 1962, three men broke out of Alcatraz and tried to cross San Francisco Bay using an improvised raft and DIY life vests inspired by projects in Popular Mechanics. [Read More]( [Alternate text] [Scientists Just Changed the Rules of What You Can Do While You Sleep]( [Scientists Just Changed the Rules of What You Can Do While You Sleep]( A new experiment shows it's possible to talk to dreaming people—and actually hear back. [Read More]( [Alternate text] [Alternate text] [Here's What to Do in a Boil Water Advisory]( [Here's What to Do in a Boil Water Advisory]( If your water is potentially contaminated, you must kill the germs before you drink it. [Read More]( [This Ferret Died 33 Years Ago. Scientists Just Brought Her Back to Life.]( [This Ferret Died 33 Years Ago. Scientists Just Brought Her Back to Life.]( Meet Elizabeth Ann, the very first clone of a U.S. endangered species. [Read More]( [Shop Popular Mechanics' Fire Starter products!]( Follow Us [Unsubscribe]( [Privacy Notice]( PopularMechanics.com ©2021 Hearst Communications Inc. All Rights Reserved. Hearst Email Privacy, 300 W 57th St., Fl. 19 (sta 1-1), New York, NY 10019