List of champions for factoring Cunningham numbers:

Quadratic sieve method:
2766	C106	2,353+	A. K. Lenstra & M. Manasse & al. with many computers
2847	C103	10,122+	A. K. Lenstra & M. Manasse & al. with many computers

Largest penultimate prime factor (ultimate factor shown also):
2582	p48*p48	 11,107-   A. K. Lenstra & M. Manasse with several computers
2838	p44*p51	  2,409+   A. K. Lenstra & M. Manasse with several computers

Elliptic curve method:
2859	P38	11,118+	A. K. Lenstra & M. Manasse with several computers
2545	P36	2,706M	A. K. Lenstra & M. Manasse with several computers




Table		First four holes in each table on July 27, 1989:

2-	2,445-	c103	2,449-	c95	2,467-	c133	2,479-	c127
2+,odd	2,361+	c103	2,373+	c108	2,419+	c122	2,427+	c98
2LM	2,722M	c103	2,794L	c104	2,802L	c107	2,802M	c104
2+,4k	2,428+	c114	2,436+	c96	2,460+	c106	2,484+	c111

3-	3,227-	c98	3,239-	c107	3,241-	c115	3,251-	c117
3+	3,236+	c92	3,263+	c105	3,269+	c123	3,271+	c91

5-	5,169-	c105	5,187-	c106	5,201-	c93	5,203-	c112
5+	5,167+	c104	5,184+	c116	5,187+	c105	5,188+	c96

6-	6,149-	c108	6,151-	c105	6,157-	c105	6,163-	c124
6+	6,155+	c94	6,164+	c125	6,169+	c101	6,172+	c99

7-	7,163-	c101	7,167-	c111	7,169-	c132	7,173-	c146
7+	7,146+	c111	7,149+	c122	7,160+	c95	7,163+	c117

10-	10,151-	c139	10,157-	c132	10,163-	c163	10,167-	c142
10+	10,134+	c98	10,142+	c116	10,146+	c109	10,149+	c123

11-	11,131-	c134	11,145-	c113	11,151-	c139	11,157-	c126
11+	11,122+	c92	11,125+	c96	11,127+	c120	11,128+	c92

12-	12,121-	c94	12,127-	c126	12,133-	c104	12,137-	c123
12+	12,118+	c110	12,119+	c100	12,125+	c96	12,127+	c99