Status of search for primes k.2ⁿ+1

701 < k < 799 & 500,000 < n < 1,000,000

Recently reserved ranges | Reserve or submit a range

Color legend:

completed (X)

being tested

available

k \ n x 1000

500-520

520-540

540-560

560-580

580-600

600-620

620-640

640-660

660-680

680-700

700-720

720-740

740-760

760-780

780-800

800-820

820-840

840-860

860-880

880-900

900-920

920-940

940-960

960-980

980-1000

701

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

X

re

703

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

X

re

705

X

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

X

re

707

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

re

709

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

re

711

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

713

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

715

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

717

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

719

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

721

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

723

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

725

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

727

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

729

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

731

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

733

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

735

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

737

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

739

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

741

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

743

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

745

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

747

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

749

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

751

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

re

753

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

re

755

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

re

757

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

re

759

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

re

761

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

763

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

765

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

767

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

769

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

771

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

773

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

775

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

777

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

779

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

X

781

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

re

783

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

re

785

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

re

787

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

re

789

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

re

791

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

793

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

795

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

797

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid

799

X

X

X

X

X

X

X

X

X

X

X

X

X

X

grid

grid

grid

grid

grid

grid