List of champions for factoring Cunningham numbers:

Number field sieve:
3409	C158	2,523-	A. K. Lenstra & D. Bernstein with two MasPars
3071	C148	2,512+	A. K. Lenstra & M. Manasse with several computers
3395	C151	2,503+	A. K. Lenstra & D. Bernstein with a MasPar
3397	C123	2,491+	A. K. Lenstra & D. Bernstein with a MasPar
3370	C145	2,488+	A. K. Lenstra & D. Bernstein with a MasPar

Elliptic curve method:
3335	P42	10,201-	D. Rusin with a SparcStation
3447	P39	3,415-	R. Silverman with a Sun-3

	First five holes in each table on March 1, 1993:

2,511-	c123	2,527-	c145	2,529-	c101	2,539-	c127	2,543-	c106
2,509+	c150	2,519+	c104	2,521+	c140	2,535+	c101	2,547+	c153
2,814L	c109	2,838L	c116	2,842L	c110	2,854M	c102	2,874M	c102
2,524+	c119	2,536+	c156	2,548+	c157	2,556+	c134	2,568+	c120

3,319-	c119	3,331-	c139	3,349-	c167	3,359-	c108	3,365-	c111
3,278+	c107	3,283+	c114	3,293+	c122	3,295+	c111	3,307+	c137

5,187-	c106	5,233-	c148	5,247-	c147	5,253-	c143	5,273-	c101
5,187+	c105	5,193+	c124	5,206+	c143	5,209+	c108	5,213+	c98

6,173-	c119	6,179-	c115	6,187-	c107	6,199-	c122	6,209-	c111
6,176+	c125	6,178+	c137	6,191+	c109	6,202+	c142	6,206+	c146

7,169-	c132	7,173-	c146	7,187-	c121	7,193-	c109	7,199-	c164
7,163+	c117	7,172+	c114	7,173+	c123	7,178+	c146	7,181+	c114

10,157-	c132	10,163-	c138	10,167-	c142	10,169-	c152	10,173-	c154
10,149+	c123	10,158+	c153	10,163+	c139	10,166+	c164	10,167+	c118

11,151-	c139	11,167-	c128	11,169-	c151	11,177-	c104	11,179-	c133
11,127+	c120	11,131+	c129	11,142+	c141	11,146+	c132	11,148+	c147

12,137-	c123	12,139-	c119	12,149-	c156	12,151-	c162	12,161-	c135
12,131+	c136	12,146+	c111	12,148+	c156	12,151+	c128	12,155+	c111

Here is the list of smaller but needed numbers:

2,529-	c101
2,519+	c104
2,535+	c101
2,854M	c102
2,874M	c102
5,187+	c105
5,213+	c98